If my child was previously on a form of anti-inflammatory (cortisone, steroid inhalers, anti-inflammatory meds) which has since been discontinued, will this lead to an increase of brain inflammation as well as a relapse?

Common medications with anti-inflammatory properties are not potent enough to change the clinical course of a child’s recovery. Starting them will not speed up or improve recovery, and stopping them will not slow or stop recovery or trigger a regression.